/sci/ - Science & Math

> why is heat the outcome and not cold

>>4727482

/thread

Stupid thread is stupid.

>in high school
>be biochem
>teacher's lectures all powerpoints
>study powerpoints, still fail tests
>mfw you're supposed to read textbook on your own time

Hey OP, while space technically starts at something like 65km, obtaining orbit, is much harder.

I've made a few potassium nitrate rockets, and they're quite fun. You're using steel. This will fail. Either compressed paper, or aluminium is great. Aluminium is probably better, but I've never used it, only PVC (it melts with too much fuel).

A thing I have to ask is, are you using powdered fuel or baked? I believe baked fuel will give a much better fire rate (although tetchy).

I watched the videos, and the velocity that thing could create is veeeerry small. My rockets create a very large amount of force, and I've made my rocket go out of sight upwards. The rockets were approx 9.5mm long, with 20mm kitty litter (bentonite clay) plugs on both sides. I can't remember the nozzle size, but it may have been 5mm. The rocket had no fins, and used a bamboo stick (about 600mm long) to keep the rocket straight.

I used a sparkler for ignition. The fuel was 3:2 KNO3/Sugar by volume. Apparently the purity of the KNO3 was 26%?

I guesstimated that the rocket went 1-2km, maybe more, because you couldn't even see the smoke trail.

This was the result of 8 previous test flights.

Unfortunately, I should have used a GPS tracker, but they cast about 40 dollars a pop.

Oh yeah, I did not gain any permission from authorities.

>>3425280
meh, but the "problem that occured in the movie was retarded. they were trying to manuever the spacecraft for something, and they burned off some useless sections of it. suddenly the fire spread "through the vacuum of space" into a very distant part of the spaceship and the whole ship just went kablooie

>>2446148

But that's an SE with no experience. Find me someone expert in SOAP and Java that's not booked up 6 months in advance?

>>2411106